Valve mechanism of internal-combustion engines



A. W. WALL.

VALVE MECHANISM OF INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG.8,1919

1,401,294. Patented Dec. 27, 1921.

3 SHEETS-SHEET l.

A. W. WALL.

VALVE MECHANISM OF INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG-8| 1919.

A. W. WALL.

VALVE MECHANISMOF INTERNAL COMBUSTION ENGINES. APPLICATION FILED Aus.8, 1919.

1,401 ,294. Patented Dec. 27, 1921.

3 SHEETSSHEET 3.

um'rso STATES PATENT OFFICE.

amn on WILLIAM WALL, or SHELDON, Mean BIRMINGHAM, ENGLAND, ASSIGNOR or. 'rnnnn-rounrns- T0 JOHN WHITE, .13., or BOULTON ROAD, BIRMINGHAM,

ENGLAND.

VALVE MncnANIsM or INTERNAL-00MBUSTION ENGINES.

Specification of Letters latent. Patented Dec, 27, 1921 Application filed August 8, 1919. Serial No. 316,195.

1 ing for an internal-combustion engine, which casing is manufactured by pressing, stamp ing, or equivalentl working the metal of which the casing s composed, said casing being characterized by What is hereinafter I termed a cylinder locating portion, that is to say, a portion which either extends longitudinally of the cylinder for the purpose of locating it, or itself constitutes the cylinder; this cylinder locating portion extends to ward and comprises means for angularly locating the crankshaft.

The present invention comprehends an engine having a casing thus manufactured, in combination with a moving sleeve or slide valve adapted to control a port or ports appertaining to the explosion space. This sleeve advantageously constitutes the cylinder proper; it is adapted to slide or move in relation to the casing, and the piston in turn slides within the said sleeve. The sleeve may be integral or sectional, and may have either a longitudinal or rotary movement, or a combination of these movements.

In order that this invention may be clearly understood and readily carried into practice, reference may be had to the appended explanatory sheets of drawings, upon which Figure 1 illustrates in elevation an embodiment of the present invention as applied to a four-stroke engine.

Fig. 2 is an end sectional elevation of the engine shown in Fig. 1.

Fig. 3 is a sectional plan of the engine shown in Figs. 1 and 2. In a convenient embodiment of the present invention, as illustrated in the drawings, and which illustrates an engine operating upon the four-stroke cycle principle, a represents the casing formed bystamping or pressing, said casing having portions 6 ada ted to constitute bearings for the cranknally of the cylinder whereby the axis of the latter is accurately located at right angles to the axis of the crankshaft. d is a sleeve adapted to slide longitudinally within each portion 0 of the casing; this sleeve 03 may, for instance, be manufactured from a length of tube. At 6, e the sleeve 0! is perforated and extruded, the extruded perforations being adapted to receive studs f which are fitted with nuts 9. Alternatively, projections or trunnions may be mounted in any appropriate manner upon the sleeve, as for instance by welding; these trunnion portions 9 constitute the medium by which longitudinal movement is imparted to the sleeve. They pass through elongated perforations h in the casing and are operated by any suitable mechanism. In the mechanism illustrated i is a countershaft carrying cams j, each of which operates the one arm 70 of abell-crank lever, the other arm Z of which is slotted to actuate the trunnion member g. One of the bell-crank levers 70, Z is provided on each side of the engine, the respective levers being rigidly mounted upon a common rocking shaft m which is rotatably mounted in bearing bracket portions m, n suitably applied to the parts of the casing occurring between the cylinders so that the shaft m passes through these parts. The bell crank levers and their supporting brackets may if desired all be manufactured in the form of stampings or pressings. A series of ports 0 are provided in the sleeve (Z adapted to register alternately with the inlet 72 and with the exhaust g. The inlet 79 and the exhaust q, are incorporated by providing internal recesses in the portions 0 of the casing, which recesses extend around the sleeve and are continued from one cylinder to another so that the explosive mixture may be placed in communication with the one extremity of the conduits 7), while the exhaust egress provision may be placed in communication with the exhaust conduits q, as for instance at the other extremity of the engine. t represents the cylinder head which may take the form of a stamping, and which is suitably secured to the extremity of the casing.

The invention is equally applicable to engines of the two-stroke cycle type.

What I claim as my invention and desire cise relation to the crank shaft, said sleeve to secure by Letters Patent is being adapted to control ports appertaining 10 In an internal combustion engine, a casto the explosion chamber, and means extraing comprising portions stamped from an neous of said casing and actuated by the integral piece for accurately locating the crank shaft for reciprocating said sleeve. cylinder and the crank shaft at right angles In witness whereof I have hereunto set to each other, a sleeve slidable in said cylinmy hand. tier-locating portion and maintained in pre- ARTHUR WILLIAM WALL. 

